Core extracting device



Dec 20, 1938.

F. MILLER CORE EXTRACTING DEVICE Filed Feb. 16 1957 26 iii ll- INVENTOR HIS ATTORNEY.

, 1'5 to similar parts,

Patented Dec. 20, 1938 I 2,140,645

UNITED-STATES PATENT OFFICE cone nxmc'rmo pnvrca Frank Miller, East Orange, N. J., assignor to Ingersoli-Rand Company, Jersey City, N. J., a corporation of New Jersey Application February 16, 1937, Serial No. 125,995

1 Claim. (Cl. 255-72) This invention relates to extracting devices, and posite sides of the casing near the upper end more particularly to an extractingdevice for rethereof. moving the core from a drill hole. At right angles to the apertures containing the One objectof the invention is to enable the ends of the tube 32 are similar apertures 33 to 5 core to be expeditiously and securely fastened to receive the outer ends of short tube sections 34. 6 the extracting device. The tubes 34 are detachably connected with the Another object is to enable the gripping eleintermediate portion of the tube 32 as by afiixment of the extracting device to readily adjust ing plugs 35 in the inner ends of the tube sections itself with respect to the surfaces against which it 34 and extending reduced stems 36 of the plugs 10 seats. into apertures 31 in the tube 32. 10

Other objects will be in part obvious and in Disposed on the tubes 32 and 34 near their part pointed out hereinafter. outer ends, as at points adjacent the inner sur- In the drawing accompanying this specification race of the casing 2|, are lifting brackets 33 to and in which similar reference numerals refer which are attached slings 39 which may be connected to a hook 40 carried by a lifting cable 4|. Figure l is an elevation, partly in section, of a The brackets 38 are held against the surface of core extracting device constructed in accordance the casing 2| by collars 42 which, like the brackets, with the practice of the invention and showing; may be loosely slidable on the tubes, and stop a practical application thereof, and t members are provided for the collars 42 in the 2 Figures 2 and 3 are transverse views taken form of pins 43 extending transversely through a through Figure 1 on the lines 22 and 3--3, re the tubes 32 and 34. spcctively, looking in the direction indicated by In the lower portion of the casing and sleeve the arrows. are registering apertures 44 to accommodate bars Referring more particularly to the drawing, the or hooks for inverting the casing 2| and effect 26 extracting device, designated in general by 20, the ready removal of the core from the casing.

comprises a frame or casing 2| adapted to be in- In practice, after the kerf 22 has been advanced sorted in a kerf 22, formed by a core d illing too a suflicient distance to form a core 23 the drilling and to encircle a core 23 defined by the kerf. tool is removed from the hole and the casing 2| Within the lower end of the casing 2| is a is then lowered to the bottom ofthe kerf or to a Sleeve 24 Of which the ow P o 25 0 t e position in which the upper portion of the sleeve. inner surface is of cylindrical shape and of 24 lies below the upper end of the core 23, deslightly small diameter than the core 23, and pending upon the length of the core. The gripextending m the S rf e 5 t0 t e upper e d ping members are then inserted between the core of the sleeve 24 is a coniform surface 23 to serve and the coniform surface 26 and power may then as a seat for a gripping device 21 adapted to enbe applied to the slings 33 for breaking the core gage the'periphery of the core 23. from the rock bed and for lifting the core from a The gripping device 21, in the form illustrated, the drill hole.

consists of a plurality of cylindrical m m rs After the core and the casing have been placed of which the outer surfaces are roughened, as by upon the surface of the ground the pins 43 in the knurling, to assure firm frictional engagement betube sections 34 are removed. The tube sections 40 tween the members 23 and the surfaces of the may then be removed through the apertures in S ve 14 d the c Eaeh pp device the casing. Thereafter the pins 43 and collars is provided with a longitudinal bore 23 to receive 42 on the tube 32 are removed to permit removal 3 fl fi Preferably endless, member 30 po 0! the latter member from the casing. The upper w h t r pp d v s ar a ang d. h end of the lifting device is then unobstructed and r pp v s m be freely da on t if then the device 20 is inverted the core 23 will cable 30 or aflixed thereto in suitablyspaced rela-- fall through the casing by gravity and thus retiOh with respeet'te each O lease the gripping members from the coniform In the upper end of the casing 2| is arranged s rfa e 26.

- means to reinforce that portion and prevent its 1 claim:

distortion or collapse upon the application of A core extracting device, comprising means power for severing the core from the mass and for having an internal inclined surface, an endless lifting the core from the drill hole. The means flexible member disunited from the said means, provided, for illustrative purposes,' comprises a and a plurality of gripping members on me flexicruciform member, designated in its entirety by ble member to seat slidably on the inclined sur- 3|, and comprising a tube 32 of which the ends face for gripping a core. extend into apertures 33 in diametrically op- F. LHLLER. 

